US8630984B1 - System and method for data extraction from email files - Google Patents
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- US8630984B1 US8630984B1 US10/759,663 US75966304A US8630984B1 US 8630984 B1 US8630984 B1 US 8630984B1 US 75966304 A US75966304 A US 75966304A US 8630984 B1 US8630984 B1 US 8630984B1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/10—File systems; File servers
Definitions
- This invention is related to obtaining of data from messaging files, and more particularly, to methods and systems to obtain data from messaging files in order to extract electronic data from such messaging files and store the data in a different format.
- a problem with managing data from backup media is particularly problematic with companies having many different tape backup systems using different backup environments.
- a previous attempt to solve the problem of retrieving information from backup tapes involves restoring the tapes using a “Native Environment” (NE) approach.
- the NE approach recreates the original backup environment from which the tape was generated so that data from the tapes can be restored and moves the restored data from the replicated environment to a target storage system for further analysis.
- NE Native Environment
- Replicating the NE in order to restore backup tapes requires that all server names, configurations, software versions, user names, and passwords are consistent with the environment as it stood at the time of the backup. Replicating all of this information becomes quite challenging as systems age, names of systems change, passwords change, software versions change, and administrators change. Furthermore, backup software is typically designed to restore data for the purposes of disaster recovery (an all or nothing proposition) and not to intelligently process large amounts of data from large numbers of media to obtain only relevant information.
- the database files for a single messaging system may have different formats and attributes depending on whether the database file is for a message, a calendar item, a contact (an address book entry), or the like.
- Currently, about the only way to extract the data is to replicate the messaging environment including individual email accounts. Replication of the messaging environment may be impossible, or if not impossible, replication is costly, time consuming, or both.
- a method and system can be used to read and obtain data from messaging files regardless of the messaging environment used to generate the messaging files.
- the method and system can read part of a messaging file to identify the type of entry (e.g., email message, calendar item, address book entry, etc.) and access information on where information within the entry is located within the messaging file based on an identifying signature.
- the method and system can be used to obtain data from messaging files without having to recreate the messaging environment, including individual email accounts.
- the data can be stored in a target storage medium in a format that is more usable and more easily searched.
- a method of obtaining data from a messaging file can include identifying an entry within the messaging file.
- the method can also include extracting electronic data corresponding to the entry.
- the method can further include storing the electronic data in a different format.
- a data processing system readable medium can have code embodied therein.
- the code can comprise instructions for carrying out the methods described herein.
- FIG. 1 includes an illustration of a system for managing data within an enterprise.
- FIG. 2 includes a process flow diagram for extracting data from a non-native environment in accordance with an embodiment of the present invention.
- FIG. 3 includes an illustration of a view of a hex editor that shows an identifying signature for a backup system.
- FIG. 4 includes an illustration of a view of a hex editor that shows an identifying signature for an EDB file.
- the methods and systems described in more detail below can be used to extract data directly from messaging files and store the data in a more usable format within a target storage system.
- the methods and systems can eliminate the expense of hardware and time spent configuring software that is usually required in order to properly replicate a messaging environment.
- Data extraction can now be performed in heterogeneous environments without having to recreate the messaging environment.
- a suite of software applications can be used to read tapes from any environment, any operating system, basically any host platforms and any backup system tape, more specifically, and process data from the messaging file and store it in a target storage system without having to recreate the messaging environment, including individual email accounts.
- the method and system described herein can obtain the data from entries within a messaging file and interpret that data without reliance on the messaging environment used to create that file. After the data is extracted, the data can be stored in a more usable form, such as within a database that can be readily searched.
- filtering the electronic data based on parameter(s) of interest can be performed as the electronic data is read from the messaging file and before storing the electronic data on the virtual media or other media at the target sub-system (e.g., all data can be read from the messaging files and placed on the virtual or other media).
- the method and system can track the location of all original data as it is placed in a database at the target sub-system.
- a messaging environment may include the hardware, software, database(s), files, or any combination thereof used to operate an email system.
- the messaging environment includes individual email accounts.
- a messaging file may include information including email messages, calendar items, address books, and the like.
- tape is used generally to describe any form of electronic storage media from which electronic data can be retrieved.
- backup tape is used to refer to a tape used to store backup data or information. Backup tapes are not limited only to tape drives, and can include hard disk drives, CD-ROMs, flash cards, or other persistent data storage medium.
- the terms “comprises,” “comprising,” “includes,” “including,” “has,” “having” or any other variation thereof, are intended to cover a non-exclusive inclusion.
- a method, process, article, or apparatus that comprises a list of elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such method, process, article, or apparatus.
- “or” refers to an inclusive or and not to an exclusive or. For example, a condition A or B is satisfied by any one of the following: A is true (or present) and B is false (or not present), A is false (or not present) and B is true (or present), and both A and B are true (or present).
- FIG. 1 illustrates one embodiment of system 100 that can be used to manage electronic data within an enterprise.
- Two sources of original data can include conventional backup tape(s) 122 and network 124 for the enterprise.
- Data on network 124 can include both End-User Information (“EUI”) and other files as shown in FIG. 1 .
- EUI may include nearly any information generated or collected by users of computers (not shown) that may be backed up by network 124 .
- the other files may include applications used to generate the EUI, such as accounting programs, engineering validation programs, word processing programs, and the like.
- System 100 can further comprise file extraction engine 142 , de-duplication engine 144 , email extraction engine 146 , collective database 162 , and backup tape(s) 182 , each of which is addressed below.
- File extraction engine 142 is coupled to backup tape(s) 122 and can separate email files from other files.
- Email extraction engine 146 is coupled to file extraction engine 142 and can extract data regarding the email without the need of recreating email accounts.
- De-duplication engine 144 is coupled electronically to network 124 , file extraction engine 142 , and email extraction engine 146 and can save one copy of content for a file or email entry and metadata for the file or email entry.
- metadata may include information regarding which computers (not shown in FIG. 1 ) on which copies of the file or email entry can be found.
- Collective database 162 into which data is stored (e.g., including targeted data 166 and compliant data 164 ), is coupled electronically to de-duplication engine 144 .
- the distinction between targeted data 166 and compliant data 164 is that one meets a criterion and the other does not.
- the compliant data 164 meets the criterion
- the targeted data 166 meets the criterion.
- the system can further comprise backup tape 182 is coupled electronically to collective database 162 and may include at least a portion of data from collective database 162 .
- arrows illustrate the principle direction of data flow in system 100 .
- the components shown in FIG. 1 may be operated by one or more computers.
- Each of the computers can comprise a central processing unit (“CPU”), a read-only memory (“ROM”), a random access memory (“RAM”), a hard drive (“HD”) or storage memory, and I/Os.
- I/Os can include a keyboard, monitor, printer, electronic pointing device (e.g., mouse, trackball, stylus, etc.), or the like.
- Each of the computers may have more than one CPU, ROM, RAM, HD, I/O, or other hardware components.
- Portions of the methods described herein may be implemented using a computer program that can operate on one or more computers.
- the computer program can include code that comprises instructions to carry out the method described herein.
- the computer program may be stored on a tangible medium, such as ROM, RAM, HD, a DASD array, magnetic tape, floppy diskette, optical storage device, or other appropriate computer readable medium.
- the computer-executable instructions may be lines of assembly code, compiled C, C ++ , Java, or other language code.
- Other architectures may be used.
- the functions of any one of the computers may be performed by a different computer.
- a computer program or its software components with such code may be embodied in more than one computer.
- a principal focus of the system and method described herein is directed to email extraction engine 146 . Still, other portions of system 100 , and particularly file extraction engine 142 , may be described to aid in understanding of the method and system described in more detail below.
- the method and system can involve taking electronic data from messaging files from backup tapes 122 , network 124 , or both without having to recreate the messaging environment or individual email accounts (e.g., *.pst files).
- the data from the messaging systems can be put into a useable, searchable form, so that later access to the data can be performed without needing to recreate the messaging environment.
- the method includes identifying messaging files on backup tape 122 and network 124 at step 204 in FIG. 2 , and sending messaging files to email extraction engine 146 at steps 206 and 222 .
- the method can also include identifying the entries within the messaging files using email extraction engine 146 at step 242 .
- the method can further include extracting data from the messaging files using email extraction engine 146 at step 244 .
- the method can still further include forwarding the electronic data from email extraction engine 146 to de-duplication engine 144 at step 246 .
- electronic data can then be stored in collective database 162 .
- the de-duplication engine 144 could be bypassed; however, duplicate copies of content within email entries may be stored in collective database 162 if de-duplication engine 144 is not used.
- system 100 can include messaging files that reside within backup tape 122 or on network 124 .
- the method includes identifying messaging files on backup tape 122 and network 124 .
- the procedure for identifying the messaging files on backup tape 122 involves intervening activities. Therefore, the procedure for backup tape 122 is addressed before the procedure for network 124 .
- the backup tape 122 may have been generated during a routine back up of a computer (not shown) using a conventional backup system. Intervening activities are used to extract files from backup tape 122 using file extraction engine 142 . Initially, data may have been backed up onto backup tape 122 from any number of systems. Those systems may have different backup environments. File extraction engine 142 can communicate with the hardware to understand the stored data formats/hardware protocols (e.g., SCSI) in order to read the raw data as shown in step 202 . In this embodiment, file extraction engine 142 interprets/reverse engineers the data from backup tape 122 (e.g., extract the data directly from the backup tape 122 by understanding the system (e.g., UNIX TAR) and the protocols used in storing the data)).
- SCSI stored data formats/hardware protocols
- file extraction engine 142 interprets/reverse engineers the data from backup tape 122 (e.g., extract the data directly from the backup tape 122 by understanding the system (e.g., UNIX TAR)
- File extraction engine 142 identifies the backup system used to generate backup tape 122 .
- backup systems include Backup ExecTM, ARCserveTM or UNIX TAR.
- a lookup table can be used to determine where different portions of the data for a file are located.
- the output from reading part of backup tape 122 is illustrated in the hex editor display of FIG. 3 .
- the left-hand portion represents the offset value
- the center portion includes hexadecimal values of the information
- the right-hand portion represents ASCII characters corresponding to the hexadecimal values.
- offset 0x101 (257 bytes from the beginning)
- “ustar” can be seen.
- file extraction engine 142 can identify the backup system used to generate backup tape 122 as a UNIX TAR backup application. Many other types of backup applications could be used and would be identified in a similar manner. After the backup system used to generate backup tape 122 is known, a lookup table can be accessed.
- the look up table may include information related to what data is stored and where it is located on the tape for a file saved using the backup system.
- the file name title is at offset 0x0 (0 bytes from the beginning of the file).
- the file name is “SampleTextFile.txt.”
- the file name includes a base portion (“SampleTextFile”) and a file name extension (“txt”) separated from the base portion by a dot.
- File extraction engine 142 can then use the file name extension to identify messaging files on backup tape 122 (step 204 ).
- the messaging files may be used with messaging systems, such as Microsoft ExchangeTM, Lotus NotesTM, EudoraTM, or the like.
- Microsoft ExchangeTM systems may be used, and Exchange Database (“EDB”) files are the messaging files being identified.
- EDB files have a file name extension of “edb”, and therefore, file extraction engine 142 searches for EDB files, which have file names of “*.edb”, wherein “*” represents the base portion of the file name and may be one or more characters long.
- Other messaging systems including Lotus NotesTM, EudoraTM, or the like, may have similar file name extensions to identify messaging files.
- the file illustrated in FIG. 3 is a text file and is not a messaging file. Therefore, SampleTextFile.txt is not forwarded to email extraction engine 146 .
- Information on network 124 may include messaging files (part of EUI in network 124 ) that came from computers (not shown) backed up onto network 124 .
- a server or other computer (not shown) used for operating network 124 may identify messaging files on network 124 in a manner similar to file extraction engine 142 .
- the server or other computer may search for files having file name extensions of “edb”. After identifying the files, whether on backup tape 122 , network 124 , or both, the messaging files are sent from file extraction engine 142 , network 124 , or both to email extraction engine 146 at steps 206 and 222 in FIG. 2 .
- the data extraction is performed by email extraction engine 146 in a manner similar to the file extraction performed by file extraction engine 142 discussed previously. Similar to file extraction, extraction of electronic data from a messaging file can be performed without having to recreate the messaging environment, such as recreating hardware, software, and individual email accounts for each of the users.
- the method can include identifying the entries within the messaging files using email extraction engine 146 at step 242 .
- the identification of the type of entry can be based on a sequence of data, a byte signature, or the like. Identifying signature is to be construed broadly to mean any information, whether a single character, combination of characters or other indicia (e.g., electronic signal(s)) when reading a messaging file that can be used, at least in part to identify the type of data within each entry within the messaging file.
- a software application can be used to convert the information to a format that is more user friendly. In one non-limiting embodiment, the hex editor may be used.
- the method and system can interpret/reverse engineer the raw data from the messaging files.
- the raw data and patterns of the raw data within the messaging files can be examined to determine the type of each entry (e.g., email messages, calendar item, address book entry, etc.) in the messaging file based on the logical format of the data.
- Different types of entries within the messaging files will have different attributes.
- an email message may have attributes including addressee, addressor, copies (whether actual or blind copies (“bcc”)), title, content, time sent, and potentially other attributes.
- a calendar item may have attributes including start time, end time, title, location, reminder, and potentially other attributes.
- An address book entry may have attributes including name, address, telephone number, fax number, mobile (cellular) number, email address, and potentially other attributes.
- the email message may have only one time attribute, whereas a calendar item has two times attributes.
- an address book entry has a telephone number attribute, which may not occur with an email message or calendar item.
- a lookup table can be accessed to determine the logical format for the electronic data corresponding to the particular entry.
- the look up table may include information related to what the type of entry and where the attributes for that entry are located within the messaging file.
- the method can also include extracting data from the message files using email extraction engine at step 244 . The data can be extracted using the logical format to determine the attributes of the entry.
- the method can include forwarding the electronic data from email extraction engine 146 to de-duplication engine 144 at step 246 .
- the extracted, de-duplicated data may be used to create or populate table(s) within collective database 162 .
- the division between the tables could be based on type of entry.
- one table may include email messages, another table may include calendar items, still another table may include address book entries, etc.
- the table(s) in collective database 162 may be in a more usable format that can be searched for information.
- extraction of electronic data from a messaging file can be performed without having to recreate the messaging environment, such as recreating hardware, software, and personal email accounts for each of the users.
- Rent of the messaging environment to restore backup data involves the procurement, setup and operation of messaging software, servers upon which to load the software, and databases upon which to store the messaging files, all of which are expensive and time consuming. The method obviates the need for those operations and costs, saving considerable time and money.
- the system and method can be designed to allow for output into nearly any electronic format desired, which adds considerably more flexibility in use for the end user, as opposed to simply having a *.pst file full of email.
- the data from the messaging files can be extracted and put directly into the database without having to creating or recreate *.pst files.
- FIG. 4 includes an illustration of a display from a hex editor that includes information from a messages table of the EDB file.
- the illustration includes hexadecimal and ASCII values for the information.
- Knowledge of address and pointer numbering schemes used by microprocessors is conventional and well known in the art.
- the example includes data that may be used by a microprocessor made by Intel Corporation of Santa Clara, Calif.
- the entry for the first row and ninth column includes the database object name for the messages the value “0E000000” in the hex editor corresponds to a database object (b-tree) numbered “0x0000000E.”
- the database object is a messages (MSG) table.
- the data in the embodiment of FIG. 4 is split into three sections: the header (within box 420 ), the row pointers (within box 460 ), and table rows (including the data within box 440 and other data outside box 440 ) between the two.
- the header contains the current/next/previous page numbers, page flags, owning object/table ID, etc.
- the row pointers specify the location and length of each table row.
- the table rows contain each individual message. Rows can be further divided into fixed and variable length columns.
- the penultimate pointer corresponds to a first message and has a hexadecimal value of “E6040A80.”
- the last four characters (0A80) include information for an address pointer.
- the “8” is not used for determining address location but the 0, A, and 0 are.
- the “0A0” corresponds to the hexadecimal value of A, which is 10 in base-10. Therefore, the first message begins 10 bytes after the starting point from the last pointer. Each pair of hexadecimal characters corresponds to one byte.
- the “E604” corresponds to a hexadecimal value of 4E6. Therefore, the first message is 4E6 (hexadecimal bytes long).
- the first message corresponds to box 440 and starts at with the “0700” characters at the end of the corresponding arrow in FIG. 4 .
- the message is address to Larry (in Administration) with copies to Joe and Sally (both in TEST 1).
- ten lines from the top include “LZFuZ.”
- the “LZFu” denotes that the file has been compressed.
- a conventional decompression technique can be used to decompress the data so that the information for the message is in a more user friendly format. Information regarding the subject and content of the message can be seen and searched more easily.
- next message starts at 4F0 bytes from the beginning and has a length of B6 (hexadecimal) bytes.
- the file includes two other messages that correspond to the other two row pointers within box 460 .
- the owning object ID to table identifier mapping and the column identifier to MAPI identifier mappings are contained in a Msysobj table.
Abstract
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US10/759,663 US8630984B1 (en) | 2003-01-17 | 2004-01-16 | System and method for data extraction from email files |
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US10104021B2 (en) * | 2015-11-18 | 2018-10-16 | Oracle International Corporation | Electronic mail data modeling for efficient indexing |
US20230067182A1 (en) * | 2019-11-29 | 2023-03-02 | Boe Technology Group Co., Ltd. | Data Processing Device and Method, and Computer Readable Storage Medium |
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